You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract 'Native' Ads Are Fine, But Viewable Ads Are Better Advertising's Biggest Challenge Is How to Get Great Content Seen By Cella Irvine, Published on November 21, 2012 1 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Register Now Already a member? Log in.